/**
 * Copyright (C) 2012 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.protoeditor.psi;

import com.intellij.extapi.psi.ASTWrapperPsiElement;
import com.intellij.lang.ASTNode;

import java.util.Collection;
import java.util.Collections;

public class ProtoBooleanLiteral extends ASTWrapperPsiElement implements ProtoLiteral {

  public ProtoBooleanLiteral(ASTNode astNode) {
    super(astNode);
  }

  public boolean getBooleanValue() {
    String text = getText();
    boolean isTrue = text.equals("true");
    boolean isFalse = text.equals("false");
    if (!isTrue && !isFalse) {
      throw new IllegalStateException("illegal text: " + text);
    }
    return isTrue;
  }

  public Collection<? extends ProtoType> getPossibleTypes() {
    return Collections.singleton(new ProtoPrimitiveType(ProtoPrimitive.BOOLEAN));
  }
}
